since it is in sf, i wouldn't be surprised if it really was a guy pretending to be lesbian. i live there and i once hooked up with someone i thought was a guy, only to find out it was a woman (i'm a straight girl)

haha yea lesbians can be worse in bed then men! (speaking as a current lesbian... used to be with men back int he day though). i think it's like men with big dicks... they assume they're good so don't have to learn any real skills... hehe